View Compilation Error

0_0_17161969_23186.c: In function 'chuli':
0_0_17161969_23186.c:35:9: error: expected expression before '/' token
         //printf("%d %d\n",x,y);
         ^
0_0_17161969_23186.c: In function 'main':
0_0_17161969_23186.c:49:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=0; i<a; i++) scanf("%s",tu[i]);
         ^
0_0_17161969_23186.c:49:9: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code